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Spin crossover behaviour in the iron(II)-2,2-dipyridilamine system: Synthesis, X-ray structure and magnetic studies |
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| Authors: | A.B. Gaspar,G. Agustí ,M.C. Muñ oz,José A. Real |
| Affiliation: | a Departament de Química Inorgánica/Institut de Ciència Molecular, Universitat de València, Doctor Moliner 50, 46100 Burjassot, València, Spain b Departament de Física Aplicada, Universitat Politécnica de València, Camino de Vera s/n, 46071 València, Spain c Donetsk Physical-Technical Institute, National Academy of Science of Ukraine, R. Luxemburg Strasse 72, Donetsk 83114, Ukraine |
| Abstract: | The monomeric compounds [Fe(dpa)2(X)2] · solv [X = NCS−(solv = 0.5H2O) (1),  (2) and dpa = 2,2-dipyridilamine] have been synthesised and characterised. They crystallise in the P21/n and in the Cc monoclinic systems, respectively. Four of six nitrogen atoms coordinated to the Fe(II) ions belong to two dpa ligands which lie in cis conformation. The remaining positions are occupied by two nitrogen atoms of the pseudo-halide ligands. The magnetic susceptibility measurements at ambient pressure have revealed that compound 1 exhibits an incomplete spin crossover behaviour (T1/2 ≈ 88 K), whereas compound 2 remains in the high-spin configuration. Pressure studies performed on compound 1 have shown virtually complete spin crossover behaviour as pressure attains 6.5 kbar. |
| Keywords: | Fe(II) complexes Spin crossover (SCO) Pressure-induced spin crossover |
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